A) production of \[N{{H}_{3}}\] in liver
B) excretion of ammonia by tadpole of frog
C) exchange of \[N{{a}^{+}}\] for \[N{{H}_{3}}\]
D) none of the above
Correct Answer: C
Solution :
The exchange of \[N{{a}^{+}}\] for \[N{{H}_{3}}\] is called ammoniogenesis. Kidney tubules excrete ammonia which tend to retain \[N{{a}^{+}}\] in body. Ammonia formation is proportional to \[{{H}^{+}}\] ions secretion in renal tubules. The \[N{{H}_{3}}\] combins with \[{{H}^{+}}\] which are excreted as ammonium salts in urine.
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